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Recent changes on CXF integration
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created by <a href="http://community.jboss.org/people/alessio.soldano%40jboss.com">Alessio Soldano</a> in <i>JBoss Web Services Development</i> - <a href="http://community.jboss.org/message/535401#535401">View the full discussion</a>
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<div class="jive-rendered-content"><p>Folks,</p><p><span>due to the requirements for </span><a class="jive-link-external-small" href="https://jira.jboss.org/jira/browse/JBWS-2971" target="_blank">https://jira.jboss.org/jira/browse/JBWS-2971</a><span> , I had to review a bit the current cxf stack integration.</span></p><p>Basically, we used to depend on CXFServlet triggering the Bus creation and have the servlet's loadBus method overwritten to also load our additional beans from jboss-cxf.xml.</p><p><span>This recently turned up to be a problem as the CXF Bus creation needs to happen at deploy time for some kind of operation to be possible; JBWS-2971 is an example, but more generally, depending on a servlet only for the bus creation is wrong (think about JMS endpoints, </span><a class="jive-link-external-small" href="https://jira.jboss.org/jira/browse/JBWS-2987" target="_blank">https://jira.jboss.org/jira/browse/JBWS-2987</a><span>).</span></p><p><span>So, first of all I added a deployment aspect in the jbws-cxf stack for eagerly parsing the cxf.xml and our (provided or generated) jboss-cxf.xml into a Bus during deployment (</span><a class="jive-link-external-small" href="https://jira.jboss.org/jira/browse/JBWS-2974" target="_blank">https://jira.jboss.org/jira/browse/JBWS-2974</a><span>). The Bus is then attached to the endpoint and the CXFServletExt checks it's already available before trying creating it.</span></p><p><span>An interesting question now is whether we want this to be the default behaviour or not. Currently there's a system property for choosing when to load the bus, the default is lazy behaviour (load in servlet). Anyway, a decision on this might also be related to how we properly review and fix the jms integration with cxf stack (</span><a class="jive-link-external-small" href="https://jira.jboss.org/jira/browse/JBWS-2987" target="_blank">https://jira.jboss.org/jira/browse/JBWS-2987</a><span>).</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Besides this, it's probably interesting to note that for fixing JBWS-2971 I started using another integration hook, ie. the Spring NamespaceHandlerSupport configuration. As you know, we're generating the jboss-cxf.xml file at deploy time and basically leveraging the spring configuration of CXF (in order to allow both stack agnostic deployments and cxf specific deployments to work seamlessly).</p><p>CXF has spring.handler configuration files that map namespaces for elements in the spring xml to default beans. We're now using a custom mapping for the jaxws.endpoint elements, which in the end allows us to overwrite the CXF org.apache.cxf.jaxws.EndpointImpl giving us control over the endpoint start/stop/publish/etc. while still delegating to the CXF one for the core processing.</p><p>Generally speaking, customizing the spring namespace handler configuration for loading different bean parsers is a powerful integration hook, to be considered in addition to the already used setup of CXF Configurer in the Bus.</p></div>
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